56 girl 

Never goes out the house without a full face and would never go to the club in trainers. Won't dance in the club but will judge you for doing it. Instagram posts are life events and will be deleted if they don't get 200+ likes. Take photos in their uni accom hallway with a glass of wine in hand.

That 56 girl was totally judging me for dancing in chem last night.

56 girl by who would have guessed November 5, 2018

5-6-7-8 girl 

Young girls, usually in a group, that are always trying to create a new dance step. Usually around ages 12 - 15, they may or may not be involved in a dance program.
They are known by their calls of "5-6-7-8" as they begin each new routine.

My little sister is such a 5-6-7-8 girl!

5-6-7-8 girl by BMnkyStar March 16, 2007